add drag-and-drop support

include/MiniFB.h

@@ -52,6 +52,8 @@ void                mfb_set_char_input_callback(struct mfb_window *window, mfb_c
 void                mfb_set_mouse_button_callback(struct mfb_window *window, mfb_mouse_button_func callback);
 void                mfb_set_mouse_move_callback(struct mfb_window *window, mfb_mouse_move_func callback);
 void                mfb_set_mouse_scroll_callback(struct mfb_window *window, mfb_mouse_scroll_func callback);
+void                mfb_set_file_drag_callback(struct mfb_window *window, mfb_file_drag_func callback);
+void                mfb_set_file_drop_callback(struct mfb_window *window, mfb_file_drop_func callback);
 
 // Getters
 const char *        mfb_get_key_name(mfb_key key);

include/MiniFB_enums.h

@@ -182,4 +182,6 @@ typedef void(*mfb_char_input_func)(struct mfb_window *window, unsigned int code)
 typedef void(*mfb_mouse_button_func)(struct mfb_window *window, mfb_mouse_button button, mfb_key_mod mod, bool isPressed);
 typedef void(*mfb_mouse_move_func)(struct mfb_window *window, int x, int y);
 typedef void(*mfb_mouse_scroll_func)(struct mfb_window *window, mfb_key_mod mod, float deltaX, float deltaY);
+typedef void(*mfb_file_drag_func)(struct mfb_window *window, int x, int y);
+typedef void(*mfb_file_drop_func)(struct mfb_window *window, char *file_list, int x, int y);
 

src/MiniFB_common.c

@@ -1,6 +1,7 @@
-#include "MiniFB.h"
+#include "../include/MiniFB.h"
 #include "WindowData.h"
-#include <MiniFB_internal.h>
+#include "MiniFB_internal.h"
+#include <string.h>
 
 //-------------------------------------
 short int g_keycodes[512] = { 0 };
@@ -87,6 +88,22 @@ mfb_set_mouse_scroll_callback(struct mfb_window *window, mfb_mouse_scroll_func c
     }
 }
 
+//-------------------------------------
+void mfb_set_file_drag_callback(struct mfb_window *window, mfb_file_drag_func callback) {
+    if(window != 0x0) {
+        SWindowData *window_data = (SWindowData *) window;
+        window_data->file_drag_func = callback;
+    }
+}
+
+//-------------------------------------
+void mfb_set_file_drop_callback(struct mfb_window *window, mfb_file_drop_func callback) {
+    if(window != 0x0) {
+        SWindowData *window_data = (SWindowData *) window;
+        window_data->file_drop_func = callback;
+    }
+}
+
 //-------------------------------------
 void
 mfb_set_user_data(struct mfb_window *window, void *user_data) {
@@ -224,6 +241,24 @@ mfb_get_key_buffer(struct mfb_window *window)  {
     return 0;
 }
 
+//-------------------------------------
+/* get next filename in file list (returns 0 when there are none) */
+char *mfb_get_dropped_file(char *file_list)
+{
+    const char *delim = "\n\r";
+
+    if (!file_list)
+        return 0;
+
+    /* a new file list has been provided: tokenize it and return first token */
+    if (strchr(file_list, '\n'))
+        return strtok(file_list, delim);
+
+    /* return next token from previous file list */
+    else
+        return strtok(0, delim);
+}
+
 //-------------------------------------
 const char *
 mfb_get_key_name(mfb_key key) {

src/MiniFB_internal.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include <MiniFB.h>
+#include "../include/MiniFB.h"
 #include "WindowData.h"
 
 #define kCall(func, ...)    if(window_data && window_data->func) window_data->func((struct mfb_window *) window_data, __VA_ARGS__);

src/MiniFB_linux.c

@@ -1,7 +1,7 @@
 #if defined(__linux__)
 
 #include <time.h>
-#include <MiniFB.h>
+#include "../include/MiniFB.h"
 
 extern double   g_timer_frequency;
 extern double   g_timer_resolution;
@@ -10,7 +10,7 @@ extern double   g_timer_resolution;
 //#define kClock      CLOCK_REALTIME
 
 uint64_t 
-mfb_timer_tick() {
+mfb_timer_tick(void) {
     struct timespec time;
 
     if (clock_gettime(kClock, &time) != 0) {
@@ -21,7 +21,7 @@ mfb_timer_tick() {
 }
 
 void 
-mfb_timer_init() {
+mfb_timer_init(void) {
     struct timespec res;
 
     if (clock_getres(kClock, &res) != 0) {

src/MiniFB_timer.c

@@ -1,4 +1,4 @@
-#include "MiniFB.h"
+#include "../include/MiniFB.h"
 #include "MiniFB_internal.h"
 #include <stdlib.h>
 

src/WindowData.h

@@ -2,7 +2,7 @@
 
 #include <stdint.h>
 #include <stdbool.h>
-#include <MiniFB_enums.h>
+#include "../include/MiniFB_enums.h"
 
 //-------------------------------------
 typedef struct {
@@ -16,6 +16,8 @@ typedef struct {
     mfb_mouse_button_func   mouse_btn_func;
     mfb_mouse_move_func     mouse_move_func;
     mfb_mouse_scroll_func   mouse_wheel_func;
+    mfb_file_drag_func      file_drag_func;
+    mfb_file_drop_func      file_drop_func;
 
     uint32_t                window_width;
     uint32_t                window_height;